Refer to the earlier video of Chiba Sensei posted recently for my view of a martial approach.

I'm sure from experience, you can have the sound of one clapping hand during a Seminar with Tissier. And other interesting things. (ahhh I didn't wash my left cheek since Endō senslei slapped me in the face some weeks ago. I loved it! )
This may be interesting while teaching (or figthing), but where is the point in it during a demonstration? How can a martial approach be shown when perfoming kata, i.e. tori and uke both know what will happen and both try to show clean techniques?